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Upper panel: absorption spectra of fisetin (15 μM) in the absence and presence of successive additions of HRAS1 (a) and HRAS2 (b) IM DNA (30 μM). Lower panel: absorption spectra of morin (15 μM) in the absence and presence of successive additions of HRAS2 (c) and HRAS1 (d) IM DNA (30 μM).
